Rolling stair



FIG. 1 is a front view of the rolling stair of the present invention.

FIG. 2 is a rear view thereof.

FIG. 3 is a top view thereof.

FIG. 4 is a bottom view thereof.

FIG. 5 is a right side view thereof. The left side view is a mirrorimage thereof; and,

FIG. 6 is a perspective view thereof.

The ornamental design for a rolling stair, as shown and described.